My honda civic 2002, run out of gas, I PUT A GALLON OF GAS AND NOW THE CAR DOES NOT START. WHAT CAN I D0

You might have to add more than 1 gallon of gas. Afterwards, turn the key to ON (Position II) and wait until the Check Engine Light goes out; then, turn the key to OFF. Repeat this 3 times, in order to fully pressurize the fuel rail. Now, turn the key to START and see if the car runs.